A soft anti-parallel (AP)-pinned spin valve (SV) sensor comprising an AP-pinned layer separated from a ferromagnetic free layer by a non-magnetic electrically conducting spacer. The AP-pinned layer includes a first ferromagnetic pinned layer separated from a second ferromagnetic pinned layer by an anti-parallel...http://www.google.com/patents/US6040961?utm_source=gb-gplus-sharePatent US6040961 - Current-pinned, current resettable soft AP-pinned spin valve sensor
